password: Password. For simple authentication mode, the password must be plain text. For md5 authentication mode, the password can be either plain text or cipher text. A plaintext password can be a string of up to 16 characters, such as user918. A cipher password must be a ciphertext string of 24 characters, such as (TT8F]Y\5SQ=^Q`MAF4<1!!.

ip: Checks IP related fields in LSPs.

osi: Checks OSI related fields in LSPs.

NOTE:

Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use the area-authentication-mode command to specify the area authentication mode and a password.

Use the undo area-authentication-mode command to restore the default.

No area authentication is configured by default.

The password in the specified mode is inserted into all outgoing Level-1 packets (LSP, CSNP and PSNP) and is used for authenticating the incoming Level-1 packets.

With area authentication configured, IS-IS discards incoming routes from untrusted routers.

Routers in a common area must have the same authentication mode and password.

If neither ip nor osi is specified, OSI related fields are checked.

Related commands: reset isis all, domain-authentication-mode, isis authentication-mode

Examples

# Configure the area authentication password as ivg, and the authentication mode as simple.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] area-authentication-mode simple ivg

auto-cost enable

Syntax

auto-cost enable

undo auto-cost enable

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use the auto-cost enable command to enable automatic link cost calculation.

Use the undo auto-cost enable command to disable the function.

This function is disabled by default.

After automatic link cost calculation is enabled, the link cost is automatically calculated based on the bandwidth reference value of an interface. When the cost-style is wide or wide-compatible, the cost value of an interface is calculated by using the formula: Cost = (reference bandwidth value/link bandwidth) × 10. When the cost style is of other types: if the interface bandwidth does not exceed 10 Mbps, the interface cost equals 60; if the interface bandwidth does not exceed 100 Mbps, the interface cost equals 50; if the interface bandwidth does not exceed 155 Mbps, the interface cost equals 40; if the interface bandwidth does not exceed 622 Mbps, the interface cost equals 30; if the interface bandwidth does not exceed 2500 Mbps, the interface cost equals 20; if the interface bandwidth exceeds 2500 Mbps, the interface cost equals 10.

Related commands: bandwidth-reference and cost-style.

Examples

# Enable automatic link cost calculation.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] auto-cost enable

bandwidth-reference (IS-IS view)

Syntax

bandwidth-reference value

undo bandwidth-reference

View

IS-IS view

Default level

2: System level

Parameters

value: Bandwidth reference value in Mbps, ranging from 1 to 2147483648.

Description

Use the bandwidth-reference command to set the bandwidth reference value for automatic link cost calculation.

Use the undo bandwidth-reference command to restore the default.

By default, the bandwidth reference value is 100 Mbps.

Related commands: auto-cost enable.

Examples

# Configure the bandwidth reference of IS-IS process 1 as 200 Mbps.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] bandwidth-reference 200

circuit-cost

Syntax

circuit-cost value [ level-1 | level-2 ]

undo circuit-cost [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

value: Link cost value. The value range varies with cost styles.

· For styles narrow, narrow-compatible and compatible, the cost value ranges from 0 to 63.

· For styles wide and wide-compatible, the cost value ranges from 0 to 16777215.

level-1: Applies the link cost to Level-1.

level-2: Applies the link cost to Level-2.

Description

Use the circuit-cost command to set a global IS-IS link cost.

Use the undo circuit-cost command to restore the default.

By default, no global link cost is configured.

If no level is specified, the specified cost applies to both Level-1 and Level-2.

Related commands: isis cost and cost-style.

Examples

# Set the global Level-1 link cost of IS-IS process 1 to 11.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] circuit-cost 11 level-1

cost-style

Syntax

cost-style { narrow | wide | wide-compatible | { compatible | narrow-compatible } [ relax-spf-limit ] }

undo cost-style

View

IS-IS view

Default level

2: System level

Parameters

narrow: Receives and sends only narrow cost style packets (The narrow cost ranges from 0 to 63).

wide: Receives and sends only wide cost style packets (The wide cost ranges from 0 to 16777215).

compatible: Receives and sends both wide and narrow cost style packets.

narrow-compatible: Receives both narrow and wide cost style packets, but sends only narrow cost style packets.

wide-compatible: Receives both narrow and wide cost style packets, but sends only wide cost style packets.

relax-spf-limit: Allows receiving routes with a cost greater than 1023. If this keyword is not specified, any route with a cost bigger than 1023 will be discarded. This keyword is only available when compatible or narrow-compatible is included.

Description

Use the cost-style command to set a cost style.

Use the undo cost-style command to restore the default.

Only narrow cost style packets can be received and sent by default.

Related commands: isis cost and circuit-cost.

Examples

# Configure the router to send only narrow cost style packets, but receive both narrow and wide cost style packets.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] cost-style narrow-compatible

default-route-advertise (IS-IS view)

Syntax

default-route-advertise [ route-policy route-policy-name | [ level-1 | level-1-2 | level-2 ] ] *

undo default-route-advertise [ route-policy route-policy-name ]

View

IS-IS view

Default level

2: System level

Parameters

topology-name: Topology name, a case-sensitive character string of 1 to 31 characters.

route-policy-name: Specifies the name of a routing policy, a case-sensitive string of 1 to 63 characters.

level-1: Advertises a Level-1 default route.

level-1-2: Advertises both Level-1 and Level-2 default routes.

level-2: Advertises a Level-2 default route.

Description

Use the default-route-advertise command to advertise a default route of 0.0.0.0/0.

Use the undo default-route-advertise command to disable default route advertisement.

Default route advertisement is disabled by default.

If no level is specified, a Level-2 default route is advertised.

The Level-1 default route is advertised to other routers in the same area, and the Level-2 default route is advertised to all the Level-2 and Level-1-2 routers.

NOTE:

Using the apply isis level-1 command in routing policy view will generate a default route in a Level-1 LSP. Using the apply isis level-2 command in routing policy view will generate a default route in a Level-2 LSP. Using the apply isis level-1-2 command in routing policy view will generate a default route in a Level-1 LSP and Level-2 LSP respectively.

Examples

# Advertise a Level-2 default route.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] default-route-advertise

display isis brief

Syntax

display isis brief [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays IS-IS brief configuration information for the IS-IS process. The process ID is in the range 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS brief configuration information for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS brief configuration information of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis brief command to view IS-IS brief configuration information.

Examples

# Display IS-IS brief configuration information.

<Sysname> display isis brief

ISIS (1) Protocol Brief Information :

network-entity:

10.0000.0000.0001.00

is-level :level-1-2

cost-style: narrow

preference : 15

Lsp-length receive : 1497

Lsp-length originate : level-1 1497

level-2 1497

maximum imported routes number : 10000

Timers:

lsp-max-age: 1200

lsp-refresh: 900

Interval between SPFs: 10

Table 1 Output description

Field		Description
network-entity		Network entity name
is-level		IS-IS Routing level
cost-style		Cost style
preference		Preference
Lsp-length receive		Maximum LSP that can be received
Lsp-length originate		Maximum LSP that can be generated
maximum imported routes number		Maximum number of redistributed Level-1/Level-2 IPv4 routes
Timers	lsp-max-age	Maximum life period of LSP
	lsp-refresh	Refresh interval of LSP
	Interval between SPFs	Interval between SPF calculations

display isis debug-switches

Syntax

display isis debug-switches { process-id | vpn-instance vpn-instance-name } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays the IS-IS debugging switch state for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS debugging switch state for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS debugging switch state for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis debug-switches command to display IS-IS debugging switch state.

Examples

# Display the debugging switch state of IS-IS process 1.

<Sysname> display isis debug-switches 1

IS-IS - Debug settings.

IS-IS SPF Triggering Events debugging is on

display isis graceful-restart status

Syntax

display isis graceful-restart status [ level-1 | level-2 ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

level-1: Displays the IS-IS Level-1 Graceful Restart state.

level-2: Displays the IS-IS Level-2 Graceful Restart state.

process-id: IS-IS Process ID, in the range 1 to 65535.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS Graceful Restart status for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis graceful-restart status command to display IS-IS Graceful Restart status.

Examples

# Display IS-IS Graceful Restart status.

<Sysname> display isis graceful-restart status

Restart information for IS-IS(1)

--------------------------------------------------------------------

IS-IS(1) Level-1 Restart Status

Restart Interval: 150

SA Bit Supported

Total Number of Interfaces = 1

Restart Status: RESTARTING

Number of LSPs Awaited: 3

T3 Timer Status:

Remaining Time: 140

T2 Timer Status:

Remaining Time: 59

IS-IS(1) Level-2 Restart Status

Restart Interval: 150

SA Bit Supported

Total Number of Interfaces = 1

Restart Status: RESTARTING

Number of LSPs Awaited: 3

T3 Timer Status:

Remaining Time: 140

T2 Timer Status:

Remaining Time: 59

Table 2 Output description

Field	Description
Restart Interval	Graceful Restart interval.
SA Bit Supported	The SA bit is set.
Total Number of Interfaces = 1	The current IS-IS interface number.
Restart Status	Graceful Restart status.
Number of LSPs Awaited	Number of LSPs not obtained by the GR restarter from GR helpers during LSDB synchronization.
T3 Timer Status	Remaining time of T3 timer.
T2 Timer Status	Remaining time of T2 Timer.

display isis interface

Syntax

display isis interface [ statistics | [ interface-type interface-number ] [ verbose ] ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

statistics: Displays IS-IS interface statistics information.

interface-type interface-number: Specifies an IS-IS interface whose statistics is to be displayed.

verbose: Displays detailed IS-IS interface information.

process-id: Displays the IS-IS interface information of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS interface information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS interface information of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis interface command to display IS-IS interface information.

Examples

# Display brief IS-IS interface information.

<Sysname> display isis interface

Interface information for ISIS(1)

---------------------------------

Interface: GigabitEthernet 1/1/1

Id IPV4.State IPV6.State MTU Type DIS

001 Up Down 1497 L1/L2 No/No

# Display detailed IS-IS interface information.

<Sysname> display isis interface verbose

Interface information for ISIS(1)

---------------------------------

Interface: Vlan-interface999

Id IPV4.State IPV6.State MTU Type DIS

001 Up Down 1497 L1/L2 No/No

SNPA Address : 000f-e237-c6e0

IP Address : 192.168.1.48

Secondary IP Address(es) :

IPV6 Link Local Address :

IPV6 Global Address(es) :

Csnp Timer Value : L1 10 L2 10

Hello Timer Value : L1 10 L2 10

Hello Multiplier Value : L1 3 L2 3

Lsp Timer Value : L12 33

Lsp Transmit-Throttle Count : L12 5

Cost : L1 10 L2 10

Priority : L1 64 L2 64

BFD : Disabled

MPLS TE Status : ON

INTF L1 TE Status : OFF

INTF L2 TE Status : ON

TE Cost : 0

TE Admin Group : 0

TE Max Bandwidth : 0

TE Max Res Bandwidth : 0

Table 3 Output description

Field	Description
Interface	Interface type and number.
Id	Circuit ID.
IPV4.State	IPv4 state.
IPV6.State	IPv6 state.
MTU	Interface MTU.
Type	Interface link adjacency type.
DIS	Whether the interface is elected as the DIS or not.
SNPA Address	Subnet access point address.
IP Address	Primary IP address.
Secondary IP Address(es)	Secondary IP addresses.
IPV6 Link Local Address	IPv6 link local address.
IPV6 Global Address(es)	IPv6 global address.
Csnp Timer Value	Interval for sending CSNP packets.
Hello Timer Value	Interval for sending Hello packets.
Hello Multiplier Value	Number of invalid Hello packets.
Lsp Timer Value	Minimum interval for sending LSP packets.
Lsp Transmit-Throttle Count	Number of LSP packets sent each time.
Cost	Cost of the interface.
Priority	DIS priority.
Retransmit Timer Value	LSP retransmission interval over the point-to-point link.
BFD	Whether BFD is enabled on the interface.
MPLS TE Status	Whether MPLS TE is enabled on the interface.
INTF L1 TE Status	Whether level-1 MPLS TE is enabled on the interface.
INTF L2 TE Status	Whether level-2 MPLS TE is enabled on the interface.
TE Cost	MPLS TE cost configured on the interface.
TE Admin Group	TE link administration group.
TE Max Bandwidth	TE link maximum bandwidth.
TE Max Res Bandwidth	TE link maximum reserved bandwidth.

# Display IS-IS interface statistics information.

<sysname> display isis interface statistics

Interface Statistics information for ISIS(1)

--------------------------------------------

Type IPv4 Up/Down IPv6 Up/Down

LAN 0/1 -/-

P2P 4/0 -/-

Table 4 Output description

Field	Description
Type	Network type of the interface: · LAN for broadcast network. · P2P for point-to-point network.
IPv4 UP	Number of IS-IS interfaces in up state.
IPv4 DOWN	Number of IS-IS interfaces in down state.
IPv6 UP	Number of IS-ISv6 interfaces in up state. If IPv6 is not enabled, this field displays a hyphen (-).
IPv6 DOWN	Number of IS-ISv6 interfaces in down state. If IPv6 is not enabled, this field displays a hyphen (-).

display isis lsdb

Syntax

display isis lsdb [ [ l1 | l2 | level-1 | level-2 ] | [ lsp-id lspid | lsp-name lspname ] | local | verbose ] * [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

l1, level-1: Displays the level-1 LSDB.

l2, level-2: Displays the level-2 LSDB.

lspid: LSP ID, in the form of sysID. Pseudo ID-fragment num, where sysID represents the originating node or pseudo node.

lspname: LSP name, in the form of Symbolic name.[Pseudo ID]-fragment num.

local: Displays LSP information generated locally.

verbose: Displays LSDB detailed information.

process-id: Displays the LSDB of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the LSDB of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the LSDB of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis lsdb command to display IS-IS link state database.

If no level is specified, both Level-1 and Level-2 link state databases are displayed.

Examples

# Display brief Level-1 LSDB information.

<Sysname> display isis lsdb level-1

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL

--------------------------------------------------------------------------

1111.1111.1111.00-00 0x00000004 0xa76 563 68 0/0/0

1111.1111.1112.00-00* 0x00000006 0x498d 578 84 0/0/0

1111.1111.1112.01-00* 0x00000001 0x4c0e 556 55 0/0/0

*-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

# Display detailed Level-1 LSDB information.

<Sysname> display isis lsdb level-1 verbose

Database information for ISIS(1)

--------------------------------

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL

--------------------------------------------------------------------------

1111.1111.1111.00-00 0x00000005 0x877 1090 68 0/0/0

SOURCE 1111.1111.1111.00

NLPID IPV4

AREA ADDR 10

INTF ADDR 3.1.1.2

NBR ID 1111.1111.1112.01 COST: 10

IP-Internal 3.1.1.0 255.255.255.0 COST: 10

1111.1111.1112.00-00* 0x00000007 0x478e 1120 84 0/0/0

SOURCE 1111.1111.1112.00

NLPID IPV4

AREA ADDR 10

INTF ADDR 3.1.1.1

INTF ADDR 2.1.2.2

NBR ID 1111.1111.1112.01 COST: 10

IP-Internal 3.1.1.0 255.255.255.0 COST: 10

IP-Internal 2.1.2.0 255.255.255.0 COST: 10

1111.1111.1112.01-00* 0x00000002 0x4a0f 1118 55 0/0/0

SOURCE 1111.1111.1112.01

NLPID IPV4

NBR ID 1111.1111.1112.00 COST: 0

NBR ID 1111.1111.1111.00 COST: 0

*-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

Table 5 Output description

Field	Description
LSPID	Link state packet ID.
Seq Num	LSP sequence number.
Checksum	LSP checksum.
Holdtime	LSP lifetime which decreases as time elapses.
Length	LSP length.
ATT/P/OL	· ATT—Attach bit. · P—Partition bit. · OL—Overload bit. 1 means the bit is set and 0 means the bit is not set.
SOURCE	System ID of the originating router.
NLPID	Network layer protocol the originating router runs.
AREA ADDR	Area address of the originating router.
INTF ADDR	IP address of the originating router’s IS-IS interface.
INTF ADDR V6	IPv6 address of the originating router’s IS-ISv6 interface.
NBR ID	Neighbor ID of the originating router.
IP-Internal	Internal IP address and mask of the originating router.
IP-External	External IP address and mask of the originating router.
IP-Extended	Extended IP address and mask of the originating router.
COST	Cost.
HOST NAME	Dynamic host name of the originating router.
ORG ID	Original system ID of the virtual system ID of the originating router.
Auth	Authentication information of the originating router.
IPV6	Internal IPv6 address and prefix of the originating router.
IPV6-Ext	External IPv6 address and prefix of the originating router.

display isis mesh-group

Syntax

display isis mesh-group [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays IS-IS mesh-group configuration information for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS mesh-group configuration information for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS mesh-group configuration information for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis mesh-group command to display IS-IS mesh-group configuration information.

Examples

# Add the POS2/1/1 interface and POS2/1/2 interface to mesh-group 100.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis mesh-group 100

[Sysname-POS2/1/1] quit

[Sysname] interface POS 2/1/2

[Sysname-POS2/1/2] isis mesh-group 100

# Display the configuration information of IS-IS mesh-group.

[Sysname-POS2/1/2] display isis mesh-group

Mesh Group information for ISIS(1)

----------------------------------------------------------------------

Interface Status

POS2/1/1 100

POS2/1/2 100

Table 6 Output description

Field	Description
Interface	Interface name
Status	Mesh-group the interface belongs to

display isis name-table

Syntax

display isis name-table [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays the host name-to-system ID mapping table for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the host name-to-system ID mapping table for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the host name-to-system ID mapping table for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis name-table command to display the host name-to-system ID mapping table.

Examples

# Configure a name for the local IS system.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-name RUTA

# Configure a static mapping for the remote IS system (system ID 0000.0000.0041, host name RUTB).

[Sysname-isis-1] is-name map 0000.0000.0041 RUTB

# Display the IS-IS host name-to-system ID mapping table.

[Sysname-isis-1] display isis name-table

Name table information for ISIS(1)

---------------------------------------------------------------

System ID Hostname Type

6789.0000.0001 RUTA DYNAMIC

0000.0000.0041 RUTB STATIC

Table 7 Output description

Field	Description
System ID	System ID
Hostname	Hostname name
Type	Mapping type (static or dynamic)

display isis peer

Syntax

display isis peer [ statistics | verbose ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

statistics: Displays IS-IS neighbor statistics information.

verbose: Displays detailed IS-IS neighbor information. Without the keyword, the command displays brief IS-IS neighbor information.

process-id: Displays the IS-IS neighbor information of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS neighbor information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS neighbor information of the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis peer command to display IS-IS neighbor information.

Examples

# Display brief IS-IS neighbor information.

<Sysname> display isis peer

Peer information for ISIS(1)

----------------------------

System Id: 1111.1111.1111

Interface: GigabitEthernet 1/1/1 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 23s Type: L1(L1L2) PRI: 64

System Id: 1111.1111.1111

Interface: GigabitEthernet 1/1/1 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 23s Type: L2(L1L2) PRI: 64

# Display detailed IS-IS neighbor information.

<Sysname> display isis peer verbose

Peer information for ISIS(1)

----------------------------

System Id: 1111.1111.1111

Interface: GigabitEthernet 1/1/1 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 27s Type: L1(L1L2) PRI: 64

Area Address(es):10

Peer IP Address(es): 3.1.1.2

Uptime: 00:38:15

Adj Protocol: IPV4

System Id: 1111.1111.1111

Interface: GigabitEthernet 1/1/1 Circuit Id: 1111.1111.1112.01

State: Up HoldTime: 28s Type: L2(L1L2) PRI: 64

Area Address(es):10

Peer IP Address(es): 3.1.1.2

Uptime: 00:38:15

Adj Protocol: IPV4

Table 8 Output description

Field	Description
System Id	System ID of the neighbor.
Interface	Interface connecting to the neighbor.
Circuit Id	Circuit ID.
State	Circuit state.
HoldTime	Holdtime. Within the holdtime if no hellos are received from the neighbor, the neighbor is considered down. If a hello is received, the holdtime is reset to the initial value.
Type	Circuit type: · L1—Means the circuit type is Level-1 and the neighbor is a Level-1 router. · L2—Means the circuit type is Level-2 and the neighbor is a Level-2 router. · L1(L1L2)—Means the circuit type is Level-1 and the neighbor is a Level-1-2 router. · L2(L1L2)—Means the circuit type is Level-2 and the neighbor is a Level-1-2 router.
PRI	DIS priority of the neighbor.
Area Address(es)	The neighbor’s area address.
Peer IP Address(es)	IP address of the neighbor.
Uptime	Time that elapsed since the neighbor relationship was formed.
Adj Protocol	Adjacency protocol.

# Display IS-IS neighbor statistics information.

<Sysname> display isis peer statistics

Peer Statistics information for ISIS(1)

---------------------------------------

Type IPv4 Up/Init IPv6 Up/Init

LAN Level-1 0/0 0/0

LAN Level-2 0/0 0/0

P2P 3/0 0/0

Table 9 Output description

Field	Description
Type	Neighbor type: · LAN Level-1—Number of Level-1 neighbors whose network type is broadcast. · LAN Level-2—Number of Level-2 neighbors whose network type is broadcast · P2P—Number of neighbors whose network type is P2P
IPv4 Up	Number of IPv4 neighbors in up state
IPv4 Init	Number of IPv4 neighbors in init state
IPv6 Up	Number of IPv6 neighbors in up state
IPv6 Init	Number of IPv6 neighbors in init state

display isis route

Syntax

display isis route [ ipv4 ] [ [ level-1 | level-2 ] | verbose ] * [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

ipv4: Displays IS-IS IPv4 routing information (the default).

verbose: Displays detailed IS-IS IPv4 routing information.

process-id: Displays the IS-IS IPv4 routing information of the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays the IS-IS IPv4 routing information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS IPv4 routing information of the public network is displayed.

level-1: Displays Level-1 IS-IS routes.

level-2: Displays Level-2 IS-IS routes.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis route command to display IS-IS IPv4 routing information.

If no level is specified, both Level-1 and Level-2 routing information will be displayed.

Examples

# Display IS-IS IPv4 routing information.

<Sysname> display isis route 1

Route information for ISIS(1)

-----------------------------

ISIS(1) IPv4 Level-1 Forwarding Table

-------------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags

--------------------------------------------------------------------------

1.1.0.0/16 20 NULL GE1/1/1 1.2.1.1 R/L/-

1.2.0.0/16 10 NULL GE1/1/1 Direct D/L/-

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

ISIS(1) IPv4 Level-2 Forwarding Table

-------------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags

--------------------------------------------------------------------------

1.1.0.0/16 20 NULL

1.2.0.0/16 10 NULL GE1/1/1 Direct D/L/-

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

Table 10 Output description

Field	Description
Route information for ISIS(1)	Route information for IS-IS process 1.
ISIS(1) IPv4 Level-1 Forwarding Table	IS-IS IPv4 routing information for Level-1.
ISIS(1) IPv4 Level-2 Forwarding Table	IS-IS IPv4 routing information for Level-2.
IPv4 Destination	IPv4 destination address.
IntCost	Interior routing cost.
ExtCost	Exterior routing cost.
ExitInterface	Exit interface.
NextHop	Next hop.
Flags	Routing state flag: · D—Direct route. · R—The route has been added into the routing table. · L—The route has been advertised in an LSP. · U—A route’s penetration flag. Setting it to UP can prevent an LSP sent from L2 to L1 from being sent back to L2.

# Display detailed IS-IS IPv4 routing information.

<Sysname> display isis route verbose

Route information for ISIS(1)

-----------------------------

ISIS(1) IPv4 Level-1 Forwarding Table

-------------------------------------

IPV4 Dest : 1.1.0.0/16 Int. Cost : 20 Ext. Cost : NULL

Admin Tag : - Src Count : 2 Flag : R/L/-

NextHop : Interface : ExitIndex :

1.2.1.1 GE1/1/1 0x00000008

IPV4 Dest : 1.2.0.0/16 Int. Cost : 10 Ext. Cost : NULL

Admin Tag : - Src Count : 2 Flag : D/L/-

NextHop : Interface : ExitIndex :

Direct GE1/1/1 0x00000000

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

ISIS(1) IPv4 Level-2 Forwarding Table

-------------------------------------

IPV4 Dest : 1.1.0.0/16 Int. Cost : 20 Ext. Cost : NULL

Admin Tag : - Src Count : 2 Flag : -/-/-

IPV4 Dest : 1.2.0.0/16 Int. Cost : 10 Ext. Cost : NULL

Admin Tag : - Src Count : 3 Flag : D/L/-

NextHop : Interface : ExitIndex :

Direct GE1/1/1 0x00000000

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

Table 11 Output description

Field	Description
Route information for ISIS(1)	Route information for IS-IS process 1.
ISIS(1) IPv4 Level-1 Forwarding Table	IS-IS IPv4 routing information for Level-1.
ISIS(1) IPv4 Level-2 Forwarding Table	IS-IS IPv4 routing information for Level-2.
IPV4 Dest	IPv4 destination.
Int. Cost	Internal route cost.
Ext. Cost	External route cost.
Admin Tag	Tag.
Src Count	Count of advertising sources.
Flag	Route state flag: · R—Indicates the route have been installed into the routing table. · L—The route has been flooded in an LSP. · U—Route leaking flag. If it is UP, routes from L2 to L1 cannot be advertised back to L2.
Next Hop	Next hop.
Interface	Outgoing interface.
ExitIndex	Index of the outgoing interface.

display isis spf-log

Syntax

display isis spf-log [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: Displays IS-IS SPF log information for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS SPF log information for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS SPF log information for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis spf-log command to display IS-IS SPF log information.

Examples

# Display IS-IS SPF log information.

<Sysname> display isis spf-log

SPF Log information for ISIS(1)

-------------------------------

Level Trig.Event No.Nodes Duration StartTime

L2 IS_SPFTRIG_PERIODIC 2 0 13:3:24

L1 IS_SPFTRIG_PERIODIC 2 0 13:18:8

L2 IS_SPFTRIG_PERIODIC 2 0 13:18:8

L1 IS_SPFTRIG_PERIODIC 2 0 13:32:28

L2 IS_SPFTRIG_PERIODIC 2 0 13:32:28

L1 IS_SPFTRIG_PERIODIC 2 0 13:44:0

L2 IS_SPFTRIG_PERIODIC 2 0 13:44:0

L1 IS_SPFTRIG_PERIODIC 2 0 13:55:43

-->L2 IS_SPFTRIG_PERIODIC 2 0 13:55:43

L1 IS_SPFTRIG_PERIODIC 2 0 11:54:12

L2 IS_SPFTRIG_PERIODIC 2 0 11:54:12

L1 IS_SPFTRIG_PERIODIC 2 0 12:7:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:7:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:21:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:21:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:35:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:35:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:49:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:49:24

L1 IS_SPFTRIG_PERIODIC 2 0 13:3:24

Table 12 Output description

Field	Description
SPF Log information for ISIS(1)	SPF log information for IS-IS process 1
Level	SPF calculation level
Trig.Event	SPF triggered event
No.Nodes	Number of SPF calculation nodes
Duration	SPF calculation duration
StartTime	SPF calculation start time

display isis statistics

Syntax

display isis statistics [ level-1 | level-1-2 | level-2 ] [ process-id | vpn-instance vpn-instance-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

level-1: Displays IS-IS Level-1 statistics.

level-1-2: Displays IS-IS Level-1-2 statistics.

level-2: Displays IS-IS Level-2 statistics.

process-id: Displays IS-IS statistics for the IS-IS process. The ID is in the range of 1 to 65535.

vpn-instance vpn-instance-name: Displays IS-IS statistics for the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS statistics for the public network is displayed.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display isis statistics command to display IS-IS statistics.

Examples

# Display IS-IS statistics.

<Sysname> display isis statistics

Statistics information for ISIS(1)

----------------------------------

Level-1 Statistics

------------------

Learnt routes information:

Total IPv4 Learnt Routes in IPv4 Routing Table: 1

Total IPv6 Learnt Routes in IPv6 Routing Table: 0

Imported routes information:

IPv4 Imported Routes:

Static: 0 Direct: 0

ISIS: 0 BGP: 0

RIP: 0 OSPF: 0

IPv6 Imported Routes:

Static: 0 Direct: 0

ISISv6: 0 BGP4+: 0

RIPng: 0 OSPFv3: 0

Lsp information:

LSP Source ID: No. of used LSPs

0000.0000.0003 002

Level-2 Statistics

------------------

Learnt routes information:

Total IPv4 Learnt Routes in IPv4 Routing Table: 0

Total IPv6 Learnt Routes in IPv6 Routing Table: 0

Imported routes information:

IPv4 Imported Routes:

Static: 0 Direct: 0

ISIS: 0 BGP: 0

RIP: 0 OSPF: 0

IPv6 Imported Routes:

Static: 0 Direct: 0

ISISv6: 0 BGP4+: 0

RIPng: 0 OSPFv3: 0

Lsp information:

LSP Source ID: No. of used LSPs

0000.0000.0003 002

Table 13 Output description

Field	Description
Statistics information for ISIS(processid)	Statistics for the IS-IS process
Level-1 Statistics	Level-1 Statistics
Level-2 Statistics	Level-2 Statistics
Learnt routes information	Number of learned IPv4 routes Number of learned IPv6 routes
Lsp information	LSP information · LSP Source ID—ID of the source system · No. of used LSPs—Number of used LSPs

domain-authentication-mode

Syntax

domain-authentication-mode { md5 | simple } password [ ip | osi ]

undo domain-authentication-mode

View

IS-IS view

Default level

2: System level

Parameters

md5: Specifies the MD5 authentication mode.

simple: Specifies the simple authentication mode.

password: Specifies a password. For simple authentication mode, the password must be plain text. For md5 authentication mode, the password can be either plain text or cipher text. A plain text password can be a string of up to 16 characters, such as user918. A cipher password must be a string of 24 characters, such as _(TT8F]Y\5SQ=^Q`MAF4<1!!.

ip: Checks IP related fields in LSPs.

osi: Checks OSI related fields in LSPs.

NOTE:

Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use the domain-authentication-mode command to specify the routing domain authentication mode and a password.

Use the undo domain-authentication-mode command to restore the default.

No routing domain authentication is configured by default

The configured password in the specified mode is inserted into all outgoing Level-2 packets (LSP, CSNP and PSNP) and is used for authenticating the incoming Level-2 packets.

All the backbone routers must have the same authentication mode and password.

If neither ip nor osi is specified, the OSI related fields in LSPs are checked.

Related commands: area-authentication-mode and isis authentication-mode.

Examples

# Specify the routing domain authentication mode as simple and password as 123456.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] domain-authentication-mode simple 123456

fast-reroute

Syntax

fast-reroute { auto | route-policy route-policy-name }

undo fast-reroute

View

IS-IS view

Default level

2: System level

Parameters

auto: Calculates a backup next hop automatically for all routes.

route-policy route-policy-name: References a routing policy to designate a next hop. The route-policy-name argument is a case-sensitive string of 1 to 63 characters. You can specify the backup next hop in the routing policy.

Description

Use the fast-reroute command to configure IS-IS fast reroute (FRR).

Use the undo fast-reroute command to restore the default.

By default, IS-IS FRR is disabled.

NOTE:

· Do not use FRR and BFD at the same time. Otherwise, FRR may fail to take effect.

· The automatic backup next hop calculation of FRR and that of TE are mutually exclusive.

Example

# Enable IS-IS FRR to automatically calculate a backup next hop for all routes.

<Sysname> system-view

[Sysname] bfd echo-source-ip 1.1.1.1

[Sysname] isis 1

[Sysname-isis-1] fast-reroute auto

# Enable IS-IS FRR to designate a backup next hop by using a referenced routing policy named frr.

<Sysname> system-view

[Sysname] bfd echo-source-ip 1.1.1.1

[Sysname] ip ip-prefix abc index 10 permit 100.1.1.0 24

[Sysname] route-policy frr permit node 10

[Sysname-route-policy] if-match ip-prefix abc

[Sysname-route-policy] apply fast-reroute backup-interface GiabitEthernet 3/1/1 backup-nexthop 193.1.1.8

[Sysname-route-policy] quit

[Sysname] isis 100

[Sysname-isis-100] fast-reroute route-policy frr

filter-policy export (IS-IS view)

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ protocol [ process-id ] ]

undo filter-policy export [ protocol [ process-id ] ]

View

IS-IS view

Default level

2: System level

Parameters

acl-number: Specifies the number of an ACL that is used to filter redistributed routes, ranging from 2000 to 3999. For ACL configuration information, see ACL and QoS Command Reference.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter redistributed routes, a case-sensitive string of 1 to 19 characters. For IP prefix list configuration information, see the chapter “Routing policy configuration commands.”

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter redistributed routes, a case-sensitive string of 1 to 19 characters. For routing policy configuration information, see the chapter “Routing policy configuration commands.”

protocol: Filters routes redistributed from the routing protocol, which can be BGP, direct, IS-IS, OSPF, RIP or static.

process-id: Process ID, in the range of 1 to 65535. It is optional only when the protocol is IS-IS, OSPF or RIP.

Description

Use the filter-policy export command to configure IS-IS to filter redistributed routes.

Use the undo filter-policy export command to disable IS-IS from filtering redistributed routes.

IS-IS does not filter redistributed routes by default.

NOTE:

If you want to reference an advanced ACL (with a number from 3000 to 3999) in the command or in the routing policy, the ACL should be configured with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command to deny/permit a route with the specified destination, or with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command to deny/permit a route with the specified destination and mask. The source keyword specifies the destination address of a route and the destination keyword specifies the subnet mask of the route (the subnet mask must be valid; otherwise, the configuration is ineffective).

Related commands: filter-policy import.

Examples

# Reference ACL 2000 to filter redistributed routes.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule deny source 192.168.10.0 0.0.0.255

[Sysname-acl-basic-2000] quit

[Sysname] isis 1

[Sysname-isis-1] filter-policy 2000 export

# Configure ACL 3000 to permit only route 113.0.0.0/16 to pass, and reference ACL 3000 to filter redistributed routes.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0

[Sysname-acl-adv-3000] rule 100 deny ip

[Sysname-acl-adv-3000] quit

[Sysname] isis 1

[Sysname-isis 1] filter-policy 3000 export

filter-policy import (IS-IS view)

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } import

undo filter-policy import

View

IS-IS view

Default level

2: System level

Parameters

acl-number: Specifies the number of an ACL that is used to filter routes calculated from received LSPs, ranging from 2000 to 3999. For ACL configuration information, see ACL and QoS Command Reference.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter routes calculated from received LSPs, a case-sensitive string of 1 to 19 characters. For IP prefix list configuration information, see the chapter “Routing policy configuration commands.”

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter routes calculated from received LSPs, a case-sensitive string of 1 to 63 characters. For routing policy configuration information, see the chapter “Routing policy configuration commands.”

Description

Use the filter-policy import command to configure IS-IS to filter routes calculated from received LSPs.

Use the undo filter-policy import command to disable IS-IS from filtering routes calculated from received LSPs.

IS-IS does not filter routes calculated from received LSPs by default.

NOTE:

Related commands: filter-policy export.

Examples

# Reference ACL 2000 to filter routes calculated from received LSPs.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule deny source 192.168.10.0 0.0.0.255

[Sysname-acl-basic-2000] quit

[Sysname] isis 1

[Sysname-isis-1] filter-policy 2000 import

# Configure ACL 3000 to permit only route 113.0.0.0/16 to pass, and reference ACL 3000 to filter routes calculated from received LSPs.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0

[Sysname-acl-adv-3000] rule 100 deny ip

[Sysname-acl-adv-3000] quit

[Sysname] isis 1

[Sysname-isis 1] filter-policy 3000 import

flash-flood

Syntax

flash-flood [ flood-count flooding-count | max-timer-interval flooding-interval | [ level-1 | level-2 ] ] *

undo flash-flood [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

flood-count flooding-count: Specifies the maximum number of LSPs to be flooded before the next SPF calculation, ranging from 1 to 15. The default is 5.

max-timer-interval flooding-interval: Specifies the delay (in milliseconds) of the flash flooding, ranging from 10 to 50000. The default is 10.

level-1: Enables flash flooding for level-1.

level-2: Enables flash flooding for level-2.

Description

Use the flash-flood command to enable IS-IS LSP flash flooding.

Use the undo flash-flood command to disable IS-IS LSP flash flooding.

IS-IS LSP flash flooding is disabled by default.

If no level is specified, the command enables IS-IS LSP flash flooding for both Level-1 and Level-2.

Examples

# Enable fast flooding and specify the maximum LSPs to be sent as 10 and the delay time as 100 milliseconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] flash-flood flood-count 10 max-timer-interval 100

graceful-restart (IS-IS view)

Syntax

graceful-restart

undo graceful-restart

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use the graceful-restart command to enable IS-IS Graceful Restart capability.

Use the undo graceful-restart command to disable IS-IS Graceful Restart capability.

By default, IS-IS Graceful Restart capability is disabled.

Examples

# Enable the Graceful Restart capability for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart

graceful-restart interval (IS-IS view)

Syntax

graceful-restart interval interval-value

undo graceful-restart interval

View

IS-IS view

Default level

2: System level

Parameters

interval-value: Graceful Restart interval, in the range 30 to 1800 seconds.

Description

Use the graceful-restart interval command to configure the Graceful Restart interval.

Use the undo graceful-restart interval command to restore the default Graceful Restart interval.

By default, the Graceful Restart interval is 300 seconds.

Examples

# Configure the Graceful Restart interval for IS-IS process 1 as 120 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart interval 120

graceful-restart suppress-sa

Syntax

graceful-restart suppress-sa

undo graceful-restart suppress-sa

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use the graceful-restart suppress-sa command to suppress the SA (Suppress-Advertisement) bit during restart.

Use the undo graceful-restart suppress-sa command to set the SA bit.

By default, the SA bit is set during restart.

Suppressing the SA bit is mainly for avoiding black hole route. If a router starts or reboots without keeping the local forwarding table, sending packets to the router may result in a severe packet loss. To avoid this, you can set the SA bit of the hello packet sent by the GR Restarter to 1. Upon receiving such hello packets, the GR Helpers will not advertise the GR Restarter through LSP.

Examples

# Suppress the SA bit during Graceful Restart.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart suppress-sa

import-route (IS-IS view)

Syntax

import-route protocol [ process-id | all-processes | allow-ibgp ] [ cost cost | cost-type { external | internal } | [ level-1 | level-1-2 | level-2 ] | route-policy route-policy-name | tag tag ] *

undo import-route protocol [ process-id | all-processes ]

View

IS-IS view

Default level

2: System level

Parameters

protocol: Redistributes routes from a routing protocol, which can be BGP, direct, IS-IS, OSPF, RIP or static.

process-id: Process ID, in the range of 1 to 65535. It is available only when the protocol is IS-IS, OSPF or RIP.

all-processes: Redistributes routes from all the processes of the specified routing protocol. This keyword takes effect only when the protocol is rip, ospf, or isis.

allow-ibgp: Allows redistribution of IBGP routes. It is available when the protocol is BGP.

cost: Specifies a cost for redistributed routes.

The range of the cost depends on its style:

· For the styles of narrow, narrow-compatible and compatible, the cost ranges from 0 to 63.

· For the styles of wide, wide-compatible, the cost ranges from 0 to 16777215.

cost-type { external | internal }: Specifies the cost type. The internal type indicates internal routes, and the external type indicates external routes. If external is specified, the cost of a redistributed route to be advertised is added by 64 to make internal routes take priority over external routes. The type is external by default. The keywords are available only when the cost type is narrow, narrow-compatible or compatible.

level-1: Redistributes routes into the Level-1 routing table.

level-1-2: Redistributes routes into both Level-1 and Level-2 routing tables.

level-2: Redistributes routes into the Level-2 routing table. If no level is specified, the routes are redistributed into the Level-2 routing table by default.

route-policy route-policy-name: Redistributes only routes satisfying the matching criteria of a routing policy, the name of which is a case-sensitive string of 1 to 63 characters.

tag tag: Specifies a tag value for redistributed routes from 1 to 4294967295.

Description

Use the import-route command to redistribute routes from another routing protocol or another IS-IS process.

Use the undo import-route command to disable route redistribution from another routing protocol or another IS-IS process.

No route redistribution is configured by default.

IS-IS takes all the redistributed routes as external routes to destinations outside the IS-IS routing domain.

Related commands: import-route isis level-2 into level-1.

CAUTION:

· Using the import-route bgp command redistributes only EBGP routes. Using the import-route bgp allow-ibgp command redistributes both EBGP and IBGP routes, but this may cause routing loops; be cautious with this command.

· Only active routes can be redistributed. Use the display ip routing-table protocol command to display route state information.

Examples

# Redistribute static routes and set the cost to 15.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] import-route static cost 15

import-route isis level-2 into level-1

Syntax

import-route isis level-2 into level-1 [ filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } | tag tag ] *

undo import-route isis level-2 into level-1

View

IS-IS view

Default level

2: System level

Parameters

acl-number: Specifies the number of an ACL that is used to filter routes from Level-2 to Level-1, ranging from 2000 to 3999. For ACL configuration information, see ACL and QoS Command Reference.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter routes from Level-2 to Level-1, a case-sensitive string of 1 to 19 characters. For IP prefix list configuration information, see the chapter “Routing policy configuration commands.”

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter routes from Level-2 to Level-1, a case-sensitive string of 1 to 63 characters. For routing policy configuration information, see the chapter “Routing policy configuration commands.”

tag tag: Specifies a tag value from 1 to 4294967295 for redistributed routes.

Description

Use the import-route isis level-2 into level-1 command to enable route leaking from Level-2 to Level-1.

Use the undo import-route isis level-2 into level-1 command to disable routing leaking.

No route leaking is configured by default.

You can specify a routing policy in the import-route isis level-2 into level-1 command to filter routes from Level-2 to Level-1. Other routing policies specified for route reception and redistribution does not affect the route leaking.

If a filter policy is configured, only routes passing it can be advertised into the Level-1 area.

Related commands: import-route.

Examples

# Enable route leaking from Level-2 to Level-1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] import-route isis level-2 into level-1

import-route limit (IS-IS view)

Syntax

import-route limit number

undo import-route limit

View

IS-IS view

Default level

2: System level

Parameters

number: Maximum number of redistributed Level 1/Level 2 IPv4 routes, in the range of 1 to 1048576.

Description

Use the import-route limit command to configure the maximum number of redistributed Level 1/Level 2 IPv4 routes.

Use the undo import-route limit command to restore the default.

Examples

# Configure IS-IS process 1 to redistribute up to 1000 Level 1/Level 2 IPv4 routes.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] import-route limit 1000

isis

Syntax

isis [ process-id ] [ vpn-instance vpn-instance-name ]

undo isis [ process-id ]

View

System view

Default level

2: System level

Parameters

process-id: Process ID, ranging from 1 to 65535. The default is 1.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the IS-IS process belongs to the public network.

Description

Use the isis command to enable an IS-IS process and specify an associated VPN instance, enter IS-IS view, or both.

Use the undo isis command to disable an IS-IS process.

Related commands: isis enable, network-entity.

Examples

# Enable IS-IS routing process 1, with the system ID being 0000.0000.0002, and area ID being 01.0001.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 01.0001.0000.0000.0002.00

isis authentication-mode

Syntax

isis authentication-mode { md5 | simple } password [ level-1 | level-2 ] [ ip | osi ]

undo isis authentication-mode [ { md5 | simple } password ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

md5: Specifies the MD5 authentication mode.

simple: Specifies the simple authentication mode.

password: Specifies a password. For simple authentication mode, the password must be plain text. For md5 authentication mode, the password can be either plain text or ciphertext. A plain text password can be a string of up to 16 characters, such as user918. A cipher password must be a string of 24 characters, such as _(TT8F]Y\5SQ=^Q`MAF4<1!!.

level-1: Configures the password for Level-1.

level-2: Configures the password for Level-2.

ip: Checks IP related fields in LSPs and SNPs.

osi: Checks OSI related fields in LSPs and SNPs.

NOTE:

· This command is not available in loopback interface view.

· Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use the isis authentication-mode command to set the IS-IS authentication mode and password for an interface.

Use the undo isis authentication-mode command to restore the default.

No neighbor relationship authentication is configured by default.

The password in the specified mode is inserted into all outgoing hello packets and is used for authenticating the incoming hello packets. Only the authentication succeeds can the neighbor relationship be formed.

NOTE:

· For two routers to become neighbors, the same authentication mode and password must be specified at both ends.

· If you configure a password without specifying a level, the password applies to both Level-1 and Level-2.

· If neither ip nor osi is specified, the OSI related fields in LSPs are checked.

· The level-1 and level-2 keywords are supported on Layer 3 Ethernet interfaces and VLAN interfaces.

· The level-1 and level-2 keywords are configurable on an interface that has had IS-IS enabled with the isis enable command.

Related commands: area-authentication-mode, domain authentication-mode.

Examples

# Configure the plain text password easykey for POS 2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis authentication-mode simple easykey

isis bfd enable

Syntax

isis bfd enable

undo isis bfd enable

View

Interface view

Default level

2: System level

Parameters

None

Description

Use the isis bfd enable command to enable BFD on an IS-IS interface for link failure detection.

Use the undo isis bfd enable command to disable BFD on an IS-IS interface.

By default, an IS-IS interface is not enabled with BFD.

Examples

# Enable BFD for IS-IS on GigabitEthernet 4/1/1.

<Sysname> system-view

[Sysname] interface GigabitEthernet 4/1/1

[Sysname-GigabitEthernet4/1/1] isis enable

[Sysname-GigabitEthernet4/1/1] isis bfd enable

isis circuit-level

Syntax

isis circuit-level [ level-1 | level-1-2 | level-2 ]

undo isis circuit-level

View

Interface view

Default level

2: System level

Parameters

level-1: Sets the circuit level to Level-1.

level-1-2: Sets the circuit level to Level-1-2.

level-2: Sets the circuit level to Level-2.

Description

Use the isis circuit-level command to set the circuit level for the interface.

Use the undo isis circuit-level command to restore the default.

An interface can establish either the Level-1 or Level-2 adjacency by default.

For a Level-1 (Level-2) router, the circuit level can only be Level-1 (Level-2). For a Level-1-2 router, you need to specify a circuit level for a specific interface to form only the specified level neighbor relationship.

Related commands: is-level.

Examples

# POS2/1/1 is connected to a non backbone router in the same area. Configure the circuit level of POS2/1/1 as Level-1 to prevent sending and receiving Level-2 Hello packets.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis enable

[Sysname-POS2/1/1] isis circuit-level level-1

isis circuit-type p2p

Syntax

isis circuit-type p2p

undo isis circuit-type

View

Interface view

Default level

2: System level

Parameters

None

Description

Use the isis circuit-type p2p command to configure the network type for an interface as P2P.

Use the undo isis circuit-type command to cancel the configuration.

By default, the network type of an interface depends on the physical media. (The network type of a VLAN interface is broadcast.)

Interfaces with different network types operate differently. For example, broadcast interfaces on a network need to elect a DIS and flood CSNP packets to synchronize the LSDBs, and P2P interfaces on a network need not elect a DIS and have a different LSDB synchronization mechanism.

If only two routers exist on a broadcast network, configure the network type of attached interfaces as P2P to avoid DIS election and CSNP flooding, saving network bandwidth and speeding up network convergence.

NOTE:

· You can perform this configuration only for a broadcast network with only two attached routers.

· This command is not supported in loopback interface view.

Examples

# Configure the network type of the GigabitEthernet 1/1/1 interface as P2P.

<Sysname> system-view

[Sysname] interface GigabitEthernet 1/1/1

[Sysname-GigabitEthernet1/1/1] isis enable

[Sysname-GigabitEthernet1/1/1] isis circuit-type p2p

isis cost

Syntax

isis [ ipv6-unicast ] cost value [ level-1 | level-2 ]

undo isis [ ipv6-unicast ] cost [ value ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

ipv6-unicast: Specifies an IPv6 unicast topology.

value: Specifies an IS-IS cost for the interface. The cost range differs with cost styles.

· For cost styles narrow, narrow-compatible and compatible, the cost ranges from 1 to 63.

· For cost styles wide and wide-compatible, the cost ranges from 1 to 16777215.

level-1: Applies the cost to Level-1.

level-2: Applies the cost to Level-2.

Description

Use the isis cost command to set the IS-IS cost of an interface.

Use the undo isis cost command to restore the default.

No cost is configured by default.

If neither level-1 nor level-2 is included, the cost applies to both level-1 and level-2.

H3C recommends to configure a proper IS-IS cost for each interface to guarantee correct route calculation.

Relate command: circuit-cost.

Examples

# Configure the Level-2 IS-IS cost as 5 for POS2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis cost 5 level-2

isis dis-name

Syntax

isis dis-name symbolic-name

undo isis dis-name

View

Interface view

Default level

2: System level

Parameters

symbolic-name: Specifies a DIS name, a string of 1 to 64 characters.

Description

Use the isis dis-name command to configure a name for a DIS to represent the pseudo node on a broadcast network.

Use the undo isis dis-name command to remove the configuration.

No name is configured for the DIS by default.

This command takes effect only on a router that must have dynamic system ID to host name mapping enabled. This command is not supported on a Point-to-Point interface.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the DIS name as LOCALAREA.

<Sysname> system-view

[Sysname] interface GigabitEthernet 1/1/1

[Sysname-GigabitEthernet1/1/1] isis dis-name LOCALAREA

isis dis-priority

Syntax

isis dis-priority value [ level-1 | level-2 ]

undo isis dis-priority [ value ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

value: Specifies a DIS priority for the interface, ranging from 0 to 127.

level-1: Applies the DIS priority to Level-1.

level-2: Applies the DIS priority to Level-2.

Description

Use the isis dis-priority command to specify a DIS priority at a specified level for an interface.

Use the undo isis dis-priority command to restore the default priority of 64 for Level-1 and Level-2.

If neither level-1 nor level-2 is specified in this command, the DIS priority applies to both Level-1 and Level-2.

On an IS-IS broadcast network, a router should be elected as the DIS at each routing level. You can specify a DIS priority at a level for an interface. The greater the interface’s priority is, the more likelihood it becomes the DIS. If multiple routers in the broadcast network have the same highest DIS priority, the router with the highest SNPA (Subnetwork Point of Attachment) address (SNPA addresses are MAC addresses on a broadcast network) becomes the DIS.

IS-IS has no backup DIS and the router with a priority of 0 can also participate in DIS election.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the DIS priority on Level-2 as 127 for GigabitEthernet 1/1/1.

<Sysname> system-view

[Sysname] interface GigabitEthernet 1/1/1

[Sysname-GigabitEthernet1/1/1] isis dis-priority 127 level-2

isis enable

Syntax

isis enable [ process-id ]

undo isis enable

View

Interface view

Default level

2: System level

Parameters

process-id: Specifies a IS-IS process ID, ranging from 1 to 65535. The default is 1.

Description

Use the isis enable command to enable an IS-IS process on the interface.

Use the undo isis enable command to disable IS-IS.

No IS-IS routing process is enabled on an interface by default.

Related commands: isis, network-entity.

Examples

# Create IS-IS routing process 1, and enable it on the GigabitEthernet 3/1/1 interface.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 10.0001.1010.1020.1030.00

[Sysname-isis-1] quit

[Sysname] interface GigabitEthernet 3/1/1

[Sysname-GigabitEthernet3/1/1] isis enable 1

isis mesh-group

Syntax

isis mesh-group { mesh-group-number | mesh-blocked }

undo isis mesh-group

View

Interface view

Default level

2: System level

Parameters

mesh-group-number: Mesh group number, ranging from 1 to 4294967295.

mesh-blocked: Blocks the interface, which sends LSPs only after receiving LSP requests.

Description

Use the isis mesh-group command to add the interface into a specified mesh group or block the interface.

Use the undo isis mesh-group command to restore the default.

By default, an interface does not belong to any mesh group.

For an interface not in a mesh group, it follows the normal process to flood the received LSPs to other interfaces. For the NBMA network with high connectivity and multiple point-to-point links, this will cause repeated LSP flooding and bandwidth waste.

After an interface is added to a mesh group, it will only flood a received LSP or a generated LSP to interfaces not belonging to the same mesh group.

If you block an interface, the interface can send LSPs only after receiving LSP requests.

NOTE:

· The mesh-group feature is only available for a point-to-point link interface.

· This command is not available in loopback interface view.

Examples

# Add the frame relay subinterface POS3/1/1 to mesh-group 3.

<Sysname> system-view

[Sysname] interface POS 3/1/1

[Sysname-POS3/1/1] isis mesh-group 3

isis mib-binding

Syntax

isis mib-binding process-id

undo isis mib-binding

View

System view

Default level

2: System level

Parameters

process-id: IS-IS process ID, in the range 1 to 65535.

Description

Use the isis mib-binding command to bind MIBs with an IS-IS process.

Use the undo isis mib-binding command to restore the default.

By default, MIBs are bound with IS-IS process 1.

Examples

# Bind MIBs with IS-IS process 100.

<Sysname> system-view

[Sysname] isis mib-binding 100

isis peer-ip-ignore

Syntax

isis peer-ip-ignore

undo isis peer-ip-ignore

View

Interface view

Default level

2: System level

Parameters

None

Description

Use the isis peer-ip-ignore command to configure the PPP interface not to check the peer’s IP address in received hello packets.

Use the undo isis peer-ip-ignore command to restore the default.

By default, the PPP interface checks the peer’s IP address upon receiving a hello packet.

An IS-IS PPP interface requires the sender of a hello packet must be on the same network segment as it. Otherwise, it discards the hello packet. You can use the isis peer-ip-ignore command to disable this restriction.

Examples

# Configure POS2/1/1 not to check the peer’s IP address in the received Hello packets.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis peer-ip-ignore

isis silent

Syntax

isis silent

undo isis silent

View

Interface view

Default level

2: System level

Parameters

None

Description

Use the isis silent command to disable the interface from sending and receiving IS-IS packets.

Use the undo isis silent command to restore the default.

By default, an interface is not disabled from sending and receiving IS-IS packets.

NOTE:

The feature is not supported on the loopback interface.

Examples

# Disable POS2/1/1 from sending and receiving IS-IS packets.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis silent

isis small-hello

Syntax

isis small-hello

undo isis small-hello

View

Interface view

Default level

2: System level

Parameters

None

Description

Use the isis small-hello command to configure the interface to send small hello packets without CLVs.

Use the undo isis small-hello command to restore the default.

An interface sends standard hello packets by default.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the POS2/1/1 interface to send small Hello packets.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis small-hello

isis timer csnp

Syntax

isis timer csnp seconds [ level-1 | level-2 ]

undo isis timer csnp [ seconds ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

seconds: Specifies on the DIS of a broadcast network the interval in seconds for sending CSNP packets, ranging from 1 to 600.

level-1: Applies the interval to Level-1.

level-2: Applies the interval to Level-2.

Description

Use the isis timer csnp command to specify on the DIS of a broadcast network the interval for sending CSNP packets.

Use the undo isis timer csnp command to restore the default.

The default CSNP interval is 10 seconds.

NOTE:

· If no level is specified, the CSNP interval applies to both Level-1 and Level-2.

· This command only applies to the DIS of a broadcast network, which sends CSNP packets periodically for LSDB synchronization.

· This command is not supported in loopback interface view.

Examples

# Configure Level-2 CSNP packets to be sent every 15 seconds over POS2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis timer csnp 15 level-2

isis timer hello

Syntax

isis timer hello seconds [ level-1 | level-2 ]

undo isis timer hello [ seconds ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

seconds: Specifies the interval in seconds for sending hello packets, ranging from 3 to 255.

level-1: Specifies the interval for sending Level-1 hello packets.

level-2: Specifies the interval for sending Level-2 hello packets.

Description

Use the isis timer hello command to specify the interval for sending hello packets.

Use the undo isis timer hello command to restore the default.

The default hello interval is 10 seconds.

NOTE:

· Level-1 and Level-2 hello packets are sent independently on a broadcast network, so you need to specify an interval for the two levels respectively. On a P2P link, Level-1 and Level-2 packets are both sent in P2P hello packets, and you need not specify an interval for two levels respectively.

· You can configure keywords level-1 and level-2 only on broadcast interfaces. Before doing that, you need to enable IS-IS on the interface.

· As the shorter the interval is, the more system resources will be occupied, you should configure a proper interval as needed.

· If no level is specified, the hello interval applies to both Level-1 and Level-2.

· This command is not supported in loopback interface view.

Related commands: isis timer holding-multiplier.

Examples

# Configure Level-2 hello packets to be sent every 20 seconds over POS2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis timer hello 20

isis timer holding-multiplier

Syntax

isis timer holding-multiplier value [ level-1 | level-2 ]

undo isis timer holding-multiplier [ value ] [ level-1 | level-2 ]

View

Interface view

Default level

2: System level

Parameters

value: Number of hello intervals, in the range of 3 to 1000.

level-1: Applies the number to the Level-1 IS-IS neighbor.

level-2: Applies the number to the Level-2 IS-IS neighbor.

NOTE:

This command is not available in loopback interface view.

Description

Use the isis timer holding-multiplier command to specify the IS-IS hello multiplier.

Use the undo isis timer holding-multiplier command to restore the default.

The default IS-IS hello multiplier is 3.

With the IS-IS hello multiplier configured, a router can uses hello packets to notify its neighbor router of the adjacency hold time (hello multiplier times hello interval). If the neighbor router receives no hello packets from this router within the hold time, it declares the adjacency down. You can adjust the adjacency hold time by changing the hello multiplier or the hello interval on an interface.

NOTE:

· Level-1 and Level-2 hello packets are sent independently on a broadcast network, so you need to specify a hello multiplier for the two levels respectively. On a P2P link, Level-1 and Level-2 packets are both sent in P2P hello packets, and you need not specify Level-1 or Level-2.

· You can configure keywords level-1 and level-2 only on broadcast interfaces. Before doing that, you need to enable IS-IS on the interface.

· If no level is specified, the hello multiplier applies to the current level.

Related commands: isis timer hello.

Examples

# Configure the hello multiplier as 6 for interface POS2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis timer holding-multiplier 6

isis timer lsp

Syntax

isis timer lsp time [ count count ]

undo isis timer lsp

View

Interface view

Default level

2: System level

Parameters

time: Specifies the minimum interval in milliseconds for sending link-state packets, ranging from 1 to 1000.

count: Specifies the maximum number of link-state packets to be sent at one time, in the range of 1 to 1000. The default is 5.

Description

Use the isis timer lsp command to configure the minimum interval for sending LSPs on the interface and specify the maximum LSPs that can be sent per time.

Use the undo isis timer lsp command to restore the default of 33ms.

Related commands: isis timer retransmit.

NOTE:

This command is not available in loopback interface view.

Examples

# Configure the interval as 500 milliseconds for sending LSPs on interface POS2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis timer lsp 500

isis timer retransmit

Syntax

isis timer retransmit seconds

undo isis timer retransmit

View

Interface view

Default level

2: System level

Parameters

seconds: Specifies the interval in seconds for retransmitting LSP packets, ranging from 1 to 300.

Description

Use the isis timer retransmit command to configure the interval for retransmitting LSP packets over a point-to-point link.

Use the undo isis timer retransmit command to restore the default.

By default, the retransmission interval is 5 seconds.

A P2P link requires a response to a sent LSP. If no response is received within the retransmission interval, the LSP is retransmitted.

You need not use this command over a broadcast link where CNSPs are broadcast periodically.

Related commands: isis timer lsp.

NOTE:

· This command is not available in loopback interface view.

· Configure a proper retransmission interval to avoid unnecessary retransmissions.

· Perform this configuration only when the link layer protocol is PPP.

Examples

# Configure the LSP retransmission interval as 10 seconds for POS2/1/1.

<Sysname> system-view

[Sysname] interface POS 2/1/1

[Sysname-POS2/1/1] isis timer retransmit 10

is-level

Syntax

is-level { level-1 | level-1-2 | level-2 }

undo is-level

View

IS-IS view

Default level

2: System level

Parameters

level-1: Configures the router to work on Level-1, which means it only calculates routes within the area, and maintains the L1 LSDB.

level-1-2: Configures the router to work on Level-1-2, which means it calculates routes and maintains the LSDBs for both L1 and L2.

level-2: Configures the router to work on Level-2, which means it calculates routes and maintains the LSDB for L2 only.

Description

Use the is-level command to specify the IS level.

Use the undo is-level command to restore the default.

The default IS level is level-1-2.

Configure all the routers as either Level-1 or Level-2 if only one area is present, because the routers do not need to maintain two identical databases at the same time. If the only area is an IP network, configure all the routers as Level-2 for scalability.

Related commands: isis circuit-level.

Examples

# Configure the router to work in Level-1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-level level-1

is-name

Syntax

is-name sys-name

undo is-name

View

IS-IS view

Default level

2: System level

Parameters

symbolic-name: Specifies a host name for the local IS, a string of 1 to 64 characters.

Description

Use the is-name command to specify a host name for the IS to enable dynamic system ID to hostname mapping.

Use the undo is-name command to disable dynamic system ID to hostname mapping.

Dynamic system ID to hostname mapping is not enabled by default.

Examples

# Configure a host name for the local IS.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-name RUTA

is-name map

Syntax

is-name map sys-id map-sys-name

undo is-name map sys-id

View

IS-IS view

Default level

2: System level

Parameters

sys-id: System ID or pseudonode ID of a remote IS.

map-sys-name: Specifies a host name for the remote IS, a string of 1 to 64 characters.

Description

Use the is-name map command to configure a system ID to host name mapping for a remote IS.

Use the undo is-name map command to remove the mapping.

Each remote IS system ID corresponds to only one name.

Examples

# Map the host name RUTB to the system ID 0000.0000.0041 of the remote IS.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-name map 0000.0000.0041 RUTB

is-snmp-traps enable

Syntax

is-snmp-traps enable

undo is-snmp-traps

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use the is-snmp-traps enable command to enable the SNMP Trap function of IS-IS.

Use the undo is-snmp-traps command to disable this function.

SNMP Trap is enabled by default.

Examples

# Enable SNMP Trap.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] is-snmp-traps enable

log-peer-change (IS-IS view)

Syntax

log-peer-change

undo log-peer-change

View

IS-IS view

Default level

2: System level

Parameters

None

Description

Use the log-peer-change command to enable the logging of IS-IS neighbor state changes.

Use the undo log-peer-change command to disable the logging.

The logging is enabled by default.

After the logging is enabled, information about IS-IS adjacency state changes is sent to the configuration terminal.

Examples

# Enable logging on the IS-IS adjacency state changes.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] log-peer-change

lsp-fragments-extend

Syntax

lsp-fragments-extend [ [ level-1 | level-1-2 | level-2 ] | [ mode-1 | mode-2 ] ] *

undo lsp-fragments-extend

View

IS-IS view

Default level

2: System level

Parameters

level-1: Applies the fragment extension mode to Level-1 LSPs.

level-1-2: Applies the fragment extension mode to both Level-1 and Level-2 LSPs.

level-2: Applies the fragment extension mode to Level-2 LSPs.

mode-1: Fragment extension mode 1, used on a network where some routers do not support LSP fragment extension.

mode-2: Fragment extension mode 2, used on a network where all routers support LSP fragment extension.

Description

Use the lsp-fragments–extend command to enable an LSP fragment extension mode for a level.

Use the undo lsp-fragments–extend command to disable LSP fragment extension for a level.

LSP fragment extension is disabled by default.

If no mode is specified, LSP fragment extension mode 1 is enabled.

If no level is specified, the LSP fragment extension mode is enabled for both Level-1 and Level-2.

Examples

# Enable LSP fragment extension mode 1 for Level-2.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] lsp-fragments-extend mode-1 level-2

lsp-length originate

Syntax

lsp-length originate size [ level-1 | level-2 ]

undo lsp-length originate [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

size: Specifies the maximum size in bytes of LSP packets, ranging from 512 to 16384.

level-1: Applies the size to Level-1 LSP packets.

level-2: Applies the size to Level-2 LSP packets.

Description

Use the lsp-length originate command to configure the maximum size of generated Level-1 or Level-2 LSPs.

Use the undo lsp-length originate command to restore the default.

By default, the maximum size of generated Level-1 and Level-2 LSPs is 1497 bytes.

NOTE:

If neither Level-1 nor Level-2 is specified in the command, the configured maximum size applies to the current IS-IS level.

Examples

# Configure the maximum size of the generated Level-2 LSPs as 1024 bytes.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] lsp-length originate 1024 level-2

lsp-length receive

Syntax

lsp-length receive size

undo lsp-length receive

View

IS-IS view

Default level

2: System level

Parameters

size: Maximum size of received LSPs, in the range of 512 to 16384 bytes.

Description

Use the lsp-length receive command to configure the maximum size of received LSPs.

Use the undo lsp-length receive command to restore the default.

By default, the maximum size of received LSPs is 1497 bytes.

Examples

# Configure the maximum size of received LSPs.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] lsp-length receive 1024

maximum load-balancing (IS-IS view)

Syntax

maximum load-balancing number

undo maximum load-balancing

View

IS-IS view

Default level

2: System level

Parameters

number: Maximum number of equal-cost routes, in the range of 1 to 8.

Description

Use the maximum load-balancing command to configure the maximum number of equal-cost routes.

Use the undo maximum load-balancing command to restore the default.

The maximum number is 8.

Examples

# Configure the maximum number of equal-cost routes as 2.

<Sysname> system-view

[Sysname] isis 100

[Sysname-isis-100] maximum load-balancing 2

# Restore the default maximum number of equal-cost routes.

[Sysname-isis-100] undo maximum load-balancing

network-entity

Syntax

network-entity net

undo network-entity net

View

IS-IS view

Default level

2: System level

Parameters

net: Network Entity Title (NET) in the format of X…X.XXXX....XXXX.00 in hexadecimal notation, with the first part X…X being the area address, the middle part XXXX....XXXX (a total of 12 “X”) being the router’s system ID, and the last part 00 being SEL.

Description

Use the network-entity command to configure the Network Entity Title for an IS-IS routing process.

Use the undo network-entity command to delete a NET.

No NET is configured by default.

A NET is a special NSAP address with the SEL being 0. The length of the NET is in the range 8 bytes to 20 bytes.

A NET comprises three parts:

· Area ID. Its length is in the range of 1 to 13 bytes.

· System ID. A system ID uniquely identifies a host or router in the area and has a fixed 6-byte length.

· SEL. It has a value of 0 and a fixed 1-byte length.

For example, a NET is ab.cdef.1234.5678.9abc.00, where area ID is ab.cdef, system ID is 1234.5678.9abc, and SEL is 00.

Related commands: isis, isis enable.

Examples

# Specify the NET as 10.0001.1010.1020.1030.00, of which 10.0001 is the area ID and 1010.1020.1030 is the system ID.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 10.0001.1010.1020.1030.00

preference (IS-IS view)

Syntax

preference { preference | route-policy route-policy-name } *

undo preference

View

IS-IS view

Default level

2: System level

Parameters

preference: Specifies the preference for IS-IS protocol, ranging from 1 to 255.

route-policy route-policy-name: Routing policy name, a case-sensitive string of 1 to 63 characters. The preference applies to routes passing the routing policy.

Description

Use the preference command to configure the preference for IS-IS.

Use the undo preference command to restore the default.

By default, IS-IS preference is 15.

If a routing policy is specified in this command, the preference (if any) set by the routing policy applies to those matched routes. Other routes use the preference set by the preference command.

When a router runs multiple routing protocols at the same time, the system will configure a preference to each routing protocol. If several protocols find routes to the same destination, the route of the routing protocol with the highest preference is selected.

Examples

# Configure the preference of IS-IS protocol as 25.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] preference 25

reset isis all

Syntax

reset isis all [ process-id | vpn-instance vpn-instance-name ]

View

User view

Default level

2: System level

Parameters

process-id: Clears the data structure information of an IS-IS process numbered from 1 to 65535.

vpn-instance vpn-instance-name: Clears the data structure information of the MPLS L3VPN. vpn-instance-name is a case-sensitive string of 1 to 31 characters. If no VPN is specified, the data structure information of the public network is cleared.

Description

Use the reset isis all command to clear all IS-IS data structure information.

No data structure information is cleared by default.

This command is used when the LSP needs to be updated immediately. For example, after performing the area-authentication-mode and domain-authentication-mode commands, you can use this command to clear old LSPs.

Related commands: area-authentication-mode, domain authentication-mode.

Examples

# Clear all IS-IS data structure information.

<Sysname> reset isis all

reset isis peer

Syntax

reset isis peer system-id [ process-id | vpn-instance vpn-instance-name ]

View

User view

Default level

2: System level

Parameters

system-id: Specifies the system ID of an IS-IS neighbor.

process-id: Clears the data structure information of an IS-IS process with an ID from 1 to 65535.

Description

Use the reset isis peer command to clear the data structure information of a specified IS-IS neighbor.

This command is used when you need to re-establish an IS-IS neighbor relationship.

Examples

# Clear the data structure information of the neighbor with the system ID 0000.0c11.1111.

<Sysname> reset isis peer 0000.0c11.1111

set-overload

Syntax

set-overload [ on-startup [ [ start-from-nbr system-id [ timeout1 [ nbr-timeout ] ] ] | timeout2 ] [ allow { external | interlevel } * ]

undo set-overload

View

IS-IS view

Default level

2: System level

Parameters

on-startup: Sets the overload bit upon system startup.

start-from-nbr system-id [ timeout1 [ nbr-timeout ] ]: Starts the nbr-timeout timer when the router begins to establish the neighbor relationship with the neighbor after system startup. If the neighbor relationship is formed within the nbr-timeout interval, IS-IS keeps the overload bit set; if not, the bit is cleared. IS-IS keeps the overload bit set within the timeout1 interval after the neighbor relationship is formed within the nbr-timeout interval.

· system-id: Specifies the neighbor.

· timeout1: The timeout1 interval is in the range 5 to 86400 seconds and defaults to 600 seconds.

· nbr-timeout: The timer has an interval from 5 to 86400 seconds. The default is 1200 seconds.

timeout2: Sets the overload bit within the timeout2 interval after system startup. The interval is in the range 5 to 86400 seconds and defaults to 600 seconds.

allow: Allows advertising address prefixes. By default, no address prefixes are allowed to be advertised when the overload bit is set.

external: Allows advertising IP address prefixes redistributed from other routing protocols with the allow keyword specified.

interlevel: Allows advertising IP address prefixes learned from different IS-IS levels with the allow keyword specified.

Description

Use the set-overload command to set the overload bit.

Use the undo set-overload command to clear the overload bit.

The overload bit is not set by default.

If the on-startup keyword is not specified, the command sets the overload bit immediately until the undo set-overload command is executed.

If the on-startup keyword is specified, IS-IS sets the overload bit upon system startup and keeps it set within the timeout2 interval.

Examples

# Set overload flag on the current router.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] set-overload

summary (IS-IS view)

Syntax

summary ip-address { mask | mask-length } [ avoid-feedback | generate_null0_route | [ level-1 | level-1-2 | level-2 ] | tag tag ] *

undo summary ip-address { mask | mask-length } [ level-1 | level-1-2 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

ip-address: Destination IP address of the summary route.

mask: Mask of the destination IP address, in dotted decimal format.

mask-length: Mask length, in the range of 0 to 32.

avoid-feedback: Avoids learning summary routes by route calculation.

generate_null0_route: Generate the Null 0 route to avoid routing loops.

level-1: Summarize only the routes redistributed to Level-1.

level-1-2: Summarizes the routes redistributed to both Level-1 and Level-2.

level-2: Summarizes only the routes redistributed to Level-2.

tag tag: Specifies a management tag, in the range of 1 to 4294967295.

Description

Use the summary command to configure a summary route.

Use the undo summary command to remove a summary route.

No summarization is configured by default.

If no level is specified, only the level-2 routes will be summarized by default.

You can summarize multiple contiguous networks into a single network to reduce the size of the routing table, as well as that of LSP and LSDB generated by the router. It is allowed to summarize native IS-IS routes and redistributed routes. After summarization, the cost of the summary route is the smallest cost of those summarized routes.

The router summarizes only routes in local LSPs.

Examples

# Configure a summary route of 202.0.0.0/8.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] summary 202.0.0.0 255.0.0.0

timer lsp-generation

Syntax

timer lsp-generation maximum-interval [ initial-interval [ second-wait-interval ] ] [ level-1 | level-2 ]

undo timer lsp-generation [ level-1 | level-2 ]

View

IS-IS view

Default level

2: System level

Parameters

maximum-interval: Maximum wait interval in seconds for generating IS-IS LSPs, in the range 1 to 120.

initial-interval: Initial wait interval in milliseconds before generating the first IS-IS LSP, in the range 10 to 60000. The default is 0.

second-wait-interval: Wait interval in milliseconds before generating the second LSP, in the range 10 to 60000. The default is 0.

level-1: Applies the intervals to Level-1.

level-2: Applies the intervals to Level-2 .If no level is specified, the specified intervals apply to both Level-1 and Level-2.

Description

Use the timer lsp-generation command to specify the wait interval before generating IS-IS LSPs.

Use the undo timer lsp-generation command to restore the default.

By default, the wait interval before LSP generation is 2 seconds.

· If only the maximum interval is specified, IS-IS waits the maximum interval before generating an LSP.

· If both the maximum and initial intervals are specified:

¡ IS-IS waits the initial interval before generating the first LSP.

¡ If the network topology is unstable—triggers occur at intervals shorter than the maximum interval, IS-IS waits the maximum interval before generating the first LSP until the network topology is stable.

· If the maximum, initial, and second wait intervals are specified:

¡ IS-IS waits the initial interval before generating the first LSP.

¡ If the network topology is unstable—triggers occur at intervals shorter than the maximum interval, IS-IS waits the second-wait-interval before generating the second LSP and penalty is applied on the wait interval before generating the next LSP. For each subsequent trigger, the wait interval before generating the LSP will be two times the previous wait interval until the maximum interval is reached.

¡ After the network topology is stable—triggers occur at intervals greater than the maximum interval, the wait interval before generating LSPs is restored to the initial interval.

Examples

# Set the maximum, initial, and second wait intervals to 10 seconds, 100 milliseconds and 200 milliseconds respectively.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer lsp-generation 10 100 200

timer lsp-max-age

Syntax

timer lsp-max-age seconds

undo timer lsp-max-age

View

IS-IS view

Default level

2: System level

Parameters

seconds: Specifies the LSP maximum aging time in seconds, ranging from 1 to 65535.

Description

Use the timer lsp-max-age command to set the LSP maximum age in the LSDB.

Use the undo timer lsp-max-age command to restore the default.

The default LSP maximum age is 1200 seconds.

Related commands: timer lsp-refresh.

Examples

# Set the maximum LSP age to 1500 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer lsp-max-age 1500

timer lsp-refresh

Syntax

timer lsp-refresh seconds

undo timer lsp-refresh

View

IS-IS view

Default level

2: System level

Parameters

seconds: LSP refresh interval in seconds, ranging from 1 to 65534.

Description

Use the timer lsp-refresh command to configure the LSP refresh interval.

Use the undo timer lsp-refresh to restore the default.

The default LSP refresh interval is 900 seconds.

Related commands: timer lsp-max-age.

NOTE:

To refresh LSPs before they are aged out, the interval configured by the timer lsp-refresh command must be smaller than that configured by the timer lsp-max-age command.

Examples

# Configure the LSP refresh interval as 1500 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer lsp-refresh 1500

timer spf

Syntax

timer spf maximum-interval [initial-interval [second-wait-interval ] ]

undo timer spf

View

IS-IS view

Default level

2: System level

Parameters

maximum-interval: Maximum SPF calculation interval in seconds, ranging from 1 to 120.

initial-interval: Wait interval before the first SPF calculation, in milliseconds, ranging from 10 to 60000.

second-wait-interval: Wait interval before the second SPF calculation, in milliseconds, ranging from 10 to 60000.

Description

Use the timer spf command to set the SPF calculation interval.

Use the undo timer spf command to restore the default.

The default IS-IS SPF calculation interval is 10 seconds.

· If only the maximum interval is specified, IS-IS waits the maximum interval before performing the SPF calculation.

· If both the maximum and initial intervals are specified:

¡ IS-IS waits the initial interval before performing the first SPF calculation.

¡ When SPF calculation triggers occur at intervals shorter than the maximum interval, the topology is considered unstable and IS-IS waits the maximum interval before performing the SPF calculation until the topology is stable.

· If maximum-interval, initial-interval, and second-wait-interval are specified:

¡ IS-IS waits the initial interval before performing the first SPF calculation.

¡ When SPF calculation triggers occur at intervals shorter than the maximum interval, the topology is considered unstable, IS-IS will wait the second-interval before performing the second SPF calculation and penalty is applied on the wait interval for the next SPF calculation. For each subsequent trigger, the wait interval before SPF calculation will be two times the previous wait interval until the maximum interval is reached.

¡ After the network topology becomes stable—triggers occur at intervals greater than the maximum interval, the wait interval before SPF calculation is restored to the initial interval.

Examples

# Configure the maximum SPF calculation interval as 10 seconds, the wait interval before the first SPF calculation as 100 milliseconds, and the wait interval before the second SPF calculation as 200 milliseconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] timer spf 10 100 200

virtual-system

Syntax

virtual-system virtual-system-id

undo virtual-system virtual-system-id

View

IS-IS view

Default level

2: System level

Parameters

virtual-system-id: Virtual system ID of the IS-IS process.

Description

Use the virtual-system command to configure a virtual system ID for the IS-IS process. Use the undo virtual-system command to remove a virtual system ID.

Up to 50 virtual system IDs can be configured for the IS-IS process.

Examples

# Set a virtual system ID of 2222.2222.2222 for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] virtual-system 2222.2222.2222

06-Layer 3 - IP Routing Command Reference

area-authentication-mode

domain-authentication-mode

fast-reroute

filter-policy export (IS-IS view)

filter-policy import (IS-IS view)

graceful-restart (IS-IS view)

graceful-restart interval (IS-IS view)

import-route (IS-IS view)

import-route isis level-2 into level-1

import-route limit (IS-IS view)

isis authentication-mode

isis bfd enable

isis circuit-type p2p

isis cost

isis enable

isis timer hello

isis timer holding-multiplier

isis timer lsp

isis timer retransmit

is-level

log-peer-change (IS-IS view)

lsp-length originate

maximum load-balancing (IS-IS view)

network-entity

preference (IS-IS view)

reset isis all

summary (IS-IS view)

timer lsp-max-age

timer lsp-refresh

virtual-system

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